Why aircraft usually fly above the troposphere layer?

Name the three filtration barriers that solutes must come across as they move from plasma to the lumen of Bowman's capsule. What components of the blood are usually excluded by these layers?

The Ozone layer of troposphere is called:

The small ozone layer on top of the stratosphere is crucial for human survival. why ?

A aeroplane is flying at a constanct horizontal velocity of 600 km/hr at an elevation of 6km towards a point directly above the target on the earth's surface. At a approprate time, the pilot releases a ball so that it strikes the taraget at the earth. The ball will appear to be falling :

a. The small ozone layer on the top of the stratosphere is crucial for human survival. Why ? b. Where is the position of UV radiation in the electromagnetic spectrum ? c. Can you convert UV to visible radiation ? Explain. d. Which radiation is adjacent to UV to the higher frequency side of the electromagnetic spectrum ?

An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft position 10 second apart is 30^(@) , what is the speed of the aircraft?

Vehicles carrying inflammable material usually have metallic ropes touching the ground during motion. Why?